Shelton, 36, adds, "That's really the kind of trust we have. There are no secrets. [I'll say,] 'Go dig through my drawers or my computer if you feel like you need to.' And that's been a really good thing, because I don't want her to ever have any doubts."

Following their May 14th anniversary, Lambert, 29, and her husband are gearing for their Wednesday night televised benefit on NBC, Healing in the Heartland, that will benefit those victims of the Oklahoma City tornado.